A class of compounds based on simple hydrocarbons like ethane, methane and propane, in which hydrogen atoms are replaced by chlorine and fluorine.

A class of compounds based on simple hydrocarbons like ethane, methane and propane, in which hydrogen atoms are replaced by chlorine and fluorine. Historically, they have been used in refrigerators, as fire suppressants, and propellant gases in aerosols. Their use caused severe damage to the ozone layer, which led to an international agreement in 1989 to phase out their use.

Historically, they have been used in refrigerators, as fire suppressants, and propellant gases in aerosols. Their use caused severe damage to the ozone layer, which led to an international agreement in 1989 to phase out their use.

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